Key Takeaways
- Cerebras Systems fell 10% after short seller Culper Research said its chips wear out in about two years.
- The two-year figure is unproven, but Culper’s point about Cerebras’s own filings needs an answer.
- The claim lands on Oracle, which added Cerebras to its cloud on Tuesday alongside NVIDIA and Alphabet chips.
Cerebras Systems (CBRS) is down 10% today after short seller Culper Research claimed its wafers “break down after just ~2 years in use.”
That erases Tuesday’s 10% gain on a deal to offer Cerebras systems on the cloud of Oracle (ORCL). Oracle also added more chips from NVIDIA (NVDA) and Alphabet (GOOG) that day.
What Culper is claiming
In a thread on X, Culper called it “a lifespan that undermines the entire business.”
Culper’s next point, from Cerebras’s own filings, is more serious. Culper says Cerebras’s draft IPO filings through December 2025 gave the systems useful lives of 1.5 to 3 years. Four months later that range was 3 to 5 years, with no explanation. Longer lives mean lower depreciation and fatter margins.
Margins would take the first hit
Cerebras’s gross margin rose from 11.7% in fiscal 2022 to 42.3% in fiscal 2024, then slipped to 39.0% in fiscal 2025.
Wafers that wear out sooner would cut into that.
A question for Oracle, and a gift for NVIDIA
Oracle plans to have Cerebras systems in its data centers by the first half of 2027, on top of $28.5 billion of capex in its latest quarter. Who pays if a wafer wears out early? Its Dec. 10 report is the first chance to ask.
NVIDIA gains from any doubt about Cerebras. Oracle said on its first-quarter call that GPU capacity up for renewal was renewed or resold at a 20% premium, mostly on chips four years old or older. NVIDIA’s own fast-inference chip, Groq 3 LPX, is in full production. Its Nov. 17 report will show where inference spending is going.
Alphabet’s TPUs reach Oracle’s cloud in early 2027, a first for a major cloud outside Google. Alphabet reports after today’s close, so watch what it says about outside TPU demand.
TIKR tracks 11 analysts on Cerebras Systems. How many say “Buy”?
See the full breakdown of Buy, Hold, and Sell ratings on Cerebras Systems, along with Wall Street’s revenue and earnings estimates, all in one place. More than 500,000 investors use TIKR to research stocks like this one. See Cerebras Systems’ Analyst Ratings
Trust is doing the heavy lifting
Cerebras traded at 19x forward sales at Tuesday’s close, against a 37x average since it listed in June. Today’s drop takes it to about 18x.
That’s steep for a company analysts expect to bring in $890 million this fiscal year.
My take: Culper profits if the stock falls, and its two-year figure is unproven. But until management explains that useful-life change with field data, I’d expect the stock to struggle to hold gains on new deals.
So what is Cerebras stock actually worth?
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